From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw0-f43.google.com (mail-yw0-f43.google.com [209.85.213.43]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id E5F8520024C for ; Tue, 13 Mar 2012 07:35:57 -0700 (PDT) Received: by yhkk6 with SMTP id k6so948385yhk.16 for ; Tue, 13 Mar 2012 07:35:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:from:date :x-google-sender-auth:message-id:subject:to:cc:content-type; bh=7WIgwSS1WMR7dS7qNUckfrzLaXtFdf+eROq0rgIgZoI=; b=LQ28w7+vb7ZULQEnvRHtP/2cDMINOD7lFFv1upvaDqWsmOFxFh3zkE70DkT81vKSZn RzJOhUauTJei0kXf3qhLis7Kfz56nsflwKLMlLftY7pSeOzCVeIsX3qZKTN6fx5UC9Mm ruehMaJHwMUeB49FdJ0atQIoAUYgy1XTIxAuUcvoG4zfLfwyPibrrOEWsE+UNdTAPjDw 95UWOBF9mqS6b+VSm0x5YOmrp7DZXouNIOmcRIz3/l36Kv+Y6Ztq+upz8W603QwLr6tN 0dTkB2+ZUpDANutweiNRPZuM9RelVV9sPxy9dJIJaaw+Yjta4QbBRrwGaV+CTbO1L2Yu 2vpg== Received: by 10.60.14.4 with SMTP id l4mr8882475oec.39.1331649356208; Tue, 13 Mar 2012 07:35:56 -0700 (PDT) MIME-Version: 1.0 Sender: tz2026@gmail.com Received: by 10.182.68.164 with HTTP; Tue, 13 Mar 2012 07:35:36 -0700 (PDT) In-Reply-To: References: <20120312212608.GC17895@thyrsus.com> <20120312213946.GE17895@thyrsus.com> <20120312224546.GA18404@thyrsus.com> <20120313014341.GC18695@thyrsus.com> <20120313021325.GA19502@thyrsus.com> <20120313045408.GB19984@thyrsus.com> From: tz Date: Tue, 13 Mar 2012 10:35:36 -0400 X-Google-Sender-Auth: jOYOFgKITNXhn-uxYsCPwc9RMCc Message-ID: To: Dave Taht Content-Type: text/plain; charset=ISO-8859-1 Cc: thumbgps-devel@lists.bufferbloat.net Subject: Re: [Thumbgps-devel] Build vs. modify vs. what should we be doing anyway? X-BeenThere: thumbgps-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Mar 2012 14:35:58 -0000 A re-radiator is possible, I had one for my car but this adds to the complexity and expense. You can do SPI or I2C - I have the EVK so can do some firmware customization for the SkyTraq 628 - I can only do 10Hz but I can put data out over SPI or I2C, but that is not the problem. The newest Arduinos use a second Atmel chip (reprogrammable!) to translate USB to serial - it replaces the FTDI, but we would have all the source and it should be common enough to have drivers everywhere. I don't remember if it has an ICP. I have a different sparkfun USB breakout Atmel chip that can be a serial adapter but has a high resolution timer input capture the PPS could be run into. http://arduino.cc/forum/index.php?topic=111.15 www.atmel.com/Images/7799S.pdf The 32u2 would have space for extra things if we wanted to do things like maintain a synchronized internal clock. We could theoretically add I2C sensors (gyro, baro/temp, accel, magnetic compass). I had something like this on a breadboard already 2 years ago (logged data from a skytraq plus all these). Note: The Skytraq chips have options to save configurations into FLASH and SRAM or just SRAM. It also has a "ROM" option if you screw things up but I don't know if the right pins are on the breakout. Most other chipsets have an option save to FLASH or EEPROM (Non-Volatile storage). We could add an EEPROM if we do our own USB micro and do a soft reset and upload the configuration if needed.